Typewriting-machine



G. W. CAMPBELL.

TYPEWRl-ING MACHINE.

APPLICATION FILED MAR. so, 191s.

G. W. CAMP-BELL.

TYPEWRITING MACHINE.

APPLICATION men MAR. ao, ma..

Patented Mar. 9,1920.

. 2 SHEETS-SHEET 2- ,www

Www@ `l ononen'jw., oAiurBELL, or tienersex), oon'nrorrenr, AssrGivonTojUNnERwoon i TYPEWRITER COMPANY, orlivnw YORK, u. Y; A oonronnrroiv orDELAWARE.

` the carriages.

. portable typewriting machines in.v whichr TYrWRITINMACHrNE. l' Y Toall whom t may concern.' Y

Be 1t known that I, Guiones` W. CAMPBELL,

a citizen of the United States, residing inl Hartford, in the county ,of,Hartfordand VState of Connecticut, have invented certain new and usefulimprovements in Typewrit-y 'ing-Machineg .of which the .following is I aspecification.

. This inventionv relatesto. thek construction ofpaper-carrlages oftypewriting machines,

and to means for supporting and* guiding g The improvements belong ,totheiclass of compactness, lightness, reliability and low cost ofmanufacture are sought. I Y v. .1 I construct the carriage frameprincipally i' of sheet-metahwhich is light, inexpensive I tion of thecarriage, and it is made in anguand. compact, The carriageV .comprises-a sheetmetal struck-up body portion and ends which rise therefromtosupport the platen, upon the front of which the types strike. f

Said bod-y portion preferably comprises frontand rear bars which, for'strengthfand stiffness, are made angular in cross-section. The front barmay constitute the floor por` larcrossesection in such afway as to formVa'longitudinal groove struck up in the bottom of the floor. Aycompanion groove, forming the front rail upon which the carriage runs,cooperates withgthe first-menq tioned groove to forni araceway for asetf of` rolls upon vvhlch the floorofthe carriage is supported'and guided.This supporting frame is preferably located near the forward portion of,the carriage, so as-to constitute thev main support of the weight of:

the carriage; and thereis also provided for lthe carriagea rearroll'to`run upon a track which is also formedupon said frame.

Sai'dsupportingframe is preferably used v'for shifting the carriagethereon up and f down, to enable dierent types `to print; and

suitable hooks or guards are provided for preventing the carriageY fromvrising accidentally from the rolls at eitherfront;` or rear.y Y i It'is'found, in practice, that the rail portion of the `supporting framemay be made` of sheet-metaland that the rails and grooves may besuccessfully struck up V and used `without grinding or otherwise exactlyfinishing either the tracks or the groove `1n the carriage,` and'thatthe carriage Lruns freely Y f y Specification of-Lette'rsPatent.: frPatefed Mar.9, 1920.j Application med March/30,1918; serial 110,225,633.f

.- about centrally, 'of a front-strike` portable typewriting machineembodying the present improvements.

rig. 21S a' plan fthe Carriage; f'

Fig. plan of the rail frame. -upon which the carriageis supportedandshifted` K Fig; 4isavperspective ofthe ioor portion of the carriage,detached.

`The paper-carriage `comprises front Vand e rear bodyportions 10,y 11vin y,the form of angle-bars and -end plates or portions 12, 18

rising therefrom; all'fof these parts being made of'sheet-metalandsecured-together by means of rivets 1li passing through suitable ears 15formed in the end plates.- The body portions 10,11,`may also be securedtogether by stilening members 15 vif desired. VJ ournaledY in the-latteris an axle 16 carrying a platen l1 7,.around which the work-sheet is fedtol position` to be struck bythe types 18 carried upon the forward endsof type-bars 19, the latter being suitably fulcrurned at 20 and operatedby links 21 and bell-cranks 9.2, `the latter connected to key-leversv23.

The front orbody portion `1()l of the car-"- riage is formed with astruck-upor inverted V-groove1211, which ,not vonly ,stilfens the barandth'us conducesto rigidity, compactness and low cost, but 'alsocooperates with, a Vf rail or'traclr 25 to .form a raceway 2,6 in

which run rolls 27 to'support and guide the carriage, said rolls beingset at right angles v to one 'another and connected-by a suitable spacer28 t0 form a truck.

f The `carriage is held dovvn upon the rail by means of a guide-roll 29,which Vruns upon the -under side of the rail 25'to prevent` liftingofthe carriage therefrom, said roll 29V being pivoted upon Vthe lowerend of Aan armj 30 which-projects downwardly and e forwardly'fromthecentral portion of the Y {carriage-Hoor, to which it is secured.

The, struckfup groove 24 in the carriagebody is formed at about themiddle portionv sof the barl 1.0,.considered from front to rear,

so that portions ofthe bar extend both for- .vvardl-y and rearwardlyfrom the grooved portion, thus making a bar having a double angular` (orcorrugated) cross-section, which is very compact and riid.' At about themiddle or" the'V rear anglebar 11 of the carriage is attached-.a pendentbracket3l, carrying a roll 3:2 to run upon a rear rail 33.` The frontandrear rails form portions. of a frame, .Whicln-'in this case, shiftsup and down to enable different types to print. The roll29 previously`described prevents ythe forward portion ofV thecarriage fromoverthrovving upwardly at the shifting operation, and a hook 34 formeduponthe lower end of the bracket 31 of the rear roll extendsrunder andVclose to the'iear rail 33, to prevent accidental lift-ing of thecarriage at the rear side thereof." Therear rail 33? is preferably inthe form of a struck-upl Hange provided i upon the upper edge of averticalplate 35V which forms the body of the shift-frame;

' side .plates V36 extendingpforvvardly, one at each end-of the`vertical plate 35, and hav` ing` pivotal connections at 37, 33 toupperandjloive'r guidingarms 39, 40, the latter journaled upon the mainframe;` atl of .the typewriting machine.

The track25 is secured to the side plates no, and preferably by suitableangleplates 36a; the -plate 35 beingsecured `to said plates 36 byears35fL on said plate 35.

Said rear plate of the shifting frame is .preferably vstlened by formingit with a U-shape liange 42, tocause it to resemble a hook incross-section, asshovvn at Fig. V1,

` the upper portion of the hook forming the rear rail 33 upon which the'carriage runs, and the bracket 31 which carries-the rear roll 32 hasthelinger'3t hookingV under said rail, 'to prevent lifting of the rearportion of the carriage. i

The carriage movements may be controlled by escapement mechanismcomprising a rack le on the carriage, which meshes with a pinion 45, thelatter connected to an escapement `wheel 16 of ordinary construction andoperation. Said rack may be carried upon arms 47 pivoted to the sideplates of the carriage to swing the rackup away from the pinion,to'release the carriage from the control of the Vescapement mechanism. YI

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used Without others. Having thusdescribed my invention, 1 claim: v

l. In a typevvriting' machine, the combination of carriage comprising asheetf; metal floor portion or base and ends rising n therefrom, saidfloor portion having a.

struck-up groove, a track underlying said ioor and formed with `a grooveto vcoperate .with the -firstngroovejto formaV race- Way,.r`o1ls in saidraceway, an -arrn extending down from said Yfloor beneath said track,fand a roll upon Asaid arm to hook under'saidvtrackto hold theearriagedovvn upon the rolls.

2. Infa typewriting machine, the com` bination of a carriage comprisinga sheet-v imetal floor portion or base and ends rising-V therefroin,said licor portion -having a lstruck-up groove, a track underlying saidlicor and formed With a groove to coperate with the rst groove totorm aracevvay,

rolls in said raceivay, an arm extending down from said floor beneathsaid track, a roll upon said ari'n to hook under said track to hold thecarriage doivn upon V.the rolls,

and means, includinga second track to cooperate Avvith said rolls tosupport and guide the carriage. Y

3.7111Y a typewriting machine, the com# bination of a frame having aV-groove therein forming a track, a'carriage having a loor provided Witha coinplernental` inrertec'l V-groovev to surinount said track,

roller bearings running iinV said grooves, :and

an arm pendent from said carriage .and having a roller to catch underthe; projecting portion oi. said track at the apex of .the

V to prevent the carriage froinlifting and f A" thereby enabling therollerswto serve as guides and prevent iforward shake of thefcarriage.Y.

e. VIn a typewriting machine, the Vcoinbination or' a. fr'anie having 'aV-groove' .therein forming a track, a carriage having a licor providedwith a coinplemental inverted Vfgroovef to surinount' said track, rollerbearings ruiming in said grooves, an arinpendent from said carriage andhaving a roller to catch under thel projecting-portion of said trackatthe apex of the V to prevent the carriage from'lifting, a rear track,a roller upon said carriage to run upon said rear track, andadditionalmeans i to vprevent the carriage from lifting from Y -110 5. Atypewriter carriage having a strucksaid rear track.

up sheet-metal base or Hoor formed with a longitudinal, invertedV-groove to coperate with 'a V-groove `in atrack frame Vto form aracevvay for rollers, and ends rising from said base to supporta platen,said car- ,bracket Vhaving aV roller mounted thereon and terminating ina retaining hook,A said supporting means having a `stiiening bead alongone edge terminating 'in an inturned and. backward 'Y y between saidYcarriage and Seidl,supportsa -ange, one ejurfaoe'of kwhich comprises asupport having@ stH-enng bead along one track forsald roller and the Hange ltself edge terminating in an nturned' fiange, the serving as a`keeper forv 'seid retzuning hook. upper surface. of which comprises .atrack 7. In a typewriter,l 1n oolnbnatlon, e lfor said rear vrollerandthe flange itself 5 platen carriage, front and ,rear supports servingas a keeper for eed retaining hook. k15

therefor, and front and rear roller bearlngs Y y W CAMPBELLY Vy saidrear bearings comprising a. bracket Wtnesseszf hayng a rollerInonntedrtheren and. ter- .ROBERT L. BUCHANAN,v V10A mmatng in aretalnlnghook, and smd veal' W. A. DoBsoN.

